mirror of
https://github.com/hybridgroup/gobot.git
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642ab409c1
This maintains `direction` and `value` `File`s for each DigitalPin implementation. Instead of Open/Read/Close we now only do Seek/Read, this speeds up Read/Write operations a bit. A silly benchmark on the mock FS gives: benchmark old ns/op new ns/op delta BenchmarkDigitalRead-8 647 7.36 -98.86% benchmark old allocs new allocs delta BenchmarkDigitalRead-8 5 0 -100.00% benchmark old bytes new bytes delta BenchmarkDigitalRead-8 96 0 -100.00%
87 lines
2.0 KiB
Go
87 lines
2.0 KiB
Go
package sysfs
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import (
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"errors"
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"os"
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"syscall"
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"testing"
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"github.com/hybridgroup/gobot"
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)
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func TestDigitalPin(t *testing.T) {
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fs := NewMockFilesystem([]string{
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"/sys/class/gpio/export",
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"/sys/class/gpio/unexport",
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"/sys/class/gpio/gpio10/value",
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"/sys/class/gpio/gpio10/direction",
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})
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SetFilesystem(fs)
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pin := NewDigitalPin(10, "custom").(*digitalPin)
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gobot.Assert(t, pin.pin, "10")
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gobot.Assert(t, pin.label, "custom")
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pin = NewDigitalPin(10).(*digitalPin)
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gobot.Assert(t, pin.pin, "10")
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gobot.Assert(t, pin.label, "gpio10")
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gobot.Assert(t, pin.value, nil)
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err := pin.Unexport()
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gobot.Assert(t, err, nil)
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gobot.Assert(t, fs.Files["/sys/class/gpio/unexport"].Contents, "10")
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err = pin.Export()
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gobot.Assert(t, err, nil)
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gobot.Assert(t, fs.Files["/sys/class/gpio/export"].Contents, "10")
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gobot.Refute(t, pin.value, nil)
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err = pin.Write(1)
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gobot.Assert(t, err, nil)
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gobot.Assert(t, fs.Files["/sys/class/gpio/gpio10/value"].Contents, "1")
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err = pin.Direction(IN)
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gobot.Assert(t, err, nil)
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gobot.Assert(t, fs.Files["/sys/class/gpio/gpio10/direction"].Contents, "in")
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data, _ := pin.Read()
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gobot.Assert(t, 1, data)
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pin2 := NewDigitalPin(30, "custom")
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err = pin2.Write(1)
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gobot.Refute(t, err, nil)
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data, err = pin2.Read()
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gobot.Refute(t, err, nil)
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gobot.Assert(t, data, 0)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EINVAL}
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}
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err = pin.Unexport()
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gobot.Assert(t, err, nil)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: errors.New("write error")}
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}
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err = pin.Unexport()
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gobot.Assert(t, err.(*os.PathError).Err, errors.New("write error"))
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: syscall.EBUSY}
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}
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err = pin.Export()
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gobot.Assert(t, err, nil)
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writeFile = func(File, []byte) (int, error) {
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return 0, &os.PathError{Err: errors.New("write error")}
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}
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err = pin.Export()
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gobot.Assert(t, err.(*os.PathError).Err, errors.New("write error"))
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}
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